Hoisting apparatus.



Rm 0 9 l 2 N A h D E T N E m A. PS I R R E F W & X 0 N K G L S 0 9 9 oo0 8 nu N HOISTING APPARATUS. APPLICATION FILED OCT. 22,1904. RENEWEDROY/.29; 1905.

3 SHEETS-SHBET 1.

No. 808,990. v PATENTED JAN. 2, 1906.

' S. L. G. KNOX & W. FBRRIS.

HOISTING APPARATUS. APPLIOA'IION FILED 00'1. 22,1904. nmmwnn NOV.29,1905.

3 SHEETS-SHEET 2.

PATENTED JAN. 2, 1906. S. L. G. KNOX'S: W. FBRRIS.

HOISTING APPARATUS.

APPLICATION FILED 001'. 22.1904. RENEWED N0v.29, 190s.

3 SHEETS-SHEET 3.

UNITED STATES PATENT oEEIoE.

SAMUEL LIPPINOOTT GRISWOLD KNOX, OF MILWAUKEE, AND WALTER FERRIS, OFSOUTH MILWAUKEE, WISCONSIN, ASSIGNORS TO THE BUOYRUS COMPANY, OF SOUTHMILWAUKEE, WISCONSIN, A CORPO- RATION OF WISOON SIN.

HOISTING APPARATUS- Specification of Letters Patent.

Patented Jan. 2, 1906 Application filed October 22, 1904. RenewedNovember 29, 1905. Serial No. 289,669.

To all whom, it may concern:

Be it known that We, SAMUEL LIPPI-NooTT GRISWOLD KNOX, residing atMilwaukee, and WALTER FERRIS, residing at South Milwaukee, county ofMilwaukee, State of Wisconsin, citizens of the United States, haveinvented certain new and useful Improvements in Hoisting Apparatus; andWe do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to hoisting apparatus, such as wrecking-cranesand like mechanism, and has for its object to provide means wherebyeither one of two hoist-blocks maybe operated by a single cable and alsoto provide means whereby the idle hoist-block may be engaged and heldclear of the load lifted by the other hoistblock.

To this end the invention comprises a hoist-- ing apparatus having a jibor similar supporting means upon which is suspended two hoistblocks bymeans of a single cable anchored at one end to the jibor support andengaging a hoisting-drum at the other end, an intermediate idler-sheaveengaged by said cable, a clamp for securing the cable to the jib orsupport at a point intermediate the hoistblocks, and a clutch forlocking one of the hoist-blocks to the jib, together with a hook orsimilar engaging member adapted to be brought into cooperation with theidle hoistblock to hold the latter against the jib or support out of theway of the load lifted by the other hoist-block, the clamp, clutch, andhook mechanism being operated by -handle vers and reach rod mechanismmounted upon the jib or support.

In the particular embodiment of the in vention illustrated in thedrawings it is shown as applied to a wrecking-crane with the usual typeof swinging jib but it is to be understood that the invention is capableof application to hoisting mechanisms generally where multiplehoist-blocks are employed.

Referring to the drawings, Figure 1 is a fragmentary side elevation of awrecl ing crane embodying the invention. Fig. 2 is a plan view.of theforward end of the jib with the hoist-blocks and sheaves omitted toavoid confusion. Fig. 3 is a side elevation thereof,

showing the rope-clam and the pendular hoist-block clutch and th tionstherefor. Fig. 4 is an enlarged perspective view, partly broken away,showing the arrangement and cooperation of the pendular clutch and thehoist-block.

Referring to the drawings, A indicates the usual type of railwaywrecking-crane car, upon which is mounted the rotary superstructure B,carrying'the pivoted jib C and the usual operating mechanism therefor.The jib C is preferably built up of metal sections and has journaled inits forward end idlersheaves c, d, and 6, over which passes anoperatingcable :r, anchored to the jib at one end by a bolt f andengaging the usual hoisting-drum at the other end.

Suspended in the bights of the cable depending from idlers c and d isthe usual double rope-block I), provided with a load-lifting hook, as iscommon in wrecking-crane practice, while a multiple block a is suspendedin the several bights of the cable between the intermediate idler d andthe anchor f, the multiple bights of the cable passing over the eoperating connecidler e and the sheaves of the hoist-block a.

and over intermediate idler d, about which it takes two or more turns,thence by several bights or turns about the several sheaves inhoist-block aand a corresponding number of sheaves on idler e to theanchor f. As above described, the purpose of the invention is to operateeither of the hoist-blocks a, or b by means of the single cable as, andthis is accomplished by the following apparatus: A transverse shaft 3,journaled on the upper side of the ib and overlying the intermediateidler d, is provided with an eccentric it, upon which is secured abrake-shoe w, adapted to engage the cable as it passes over the idler dand hold said idler and the cable against movement when the brake isthrown on. To

operate the brake, a link If, connected to a crank on the end of theshaft 8, serves to rock the latter and cause the eccentric on theopposite end of said shaft to apply or release the brake-shoe. To thelower end of said link is connected an operating device comprising aseries of rod-sections v and intermediate bellcranks 2 the other end ofthe series of rodsections being coupled to a hand-lever z, pivoted tothe side of the jib, so that the brake may be thrown on or off by anoperator on the car manipulating the hand-lever 2. It will be seen thatwhen the brake is applied the cable is anchored to the idler (Z, so thatno motion is imparted to that portion of the cable which supports thehoist-block a and the latter remains stationary. The part of the cableforward of the idler d, however, may be taken up or paid off by thehoisting-drum and will run freely over the idler 0, thereby raising orlowering the hoist-block b.

In order to operate hoist-block (1 alone, it is necessary to securehoistblock I) to the jib,

and to accomplish this suitable clutch mech-- anism is provided forlocking hoist-block b to the under side of the jib and preferably injuxtaposition to the idler c. For this purpose hoist-block b is providedwith a strap t, extending over the top of the sheave of said block,which strap is adapted to be engaged by a clutch carried by a pendularframe. This clutch mechanism consists of the following parts: A U-shapedpendular frame 72. is mounted upon the shaft 9 of idler c and isprovided with two depending sections h, which are adapted to pass uponeither side of the strap t to guide the hoist-block 1) into properposition to be clutched. J ournaled in the bottom of the U -shaped yoke7L and in brackets extending from opposite sides of said yoke are twoshort shafts b I), having lateral wings a 0, respectively, which wingshave inwardly-disposed angular fingers f f, adapted to engage the bandof the strap t. Passing through the wings c c is a bolt Z, having aspring m, which is suitably tensioned by set-nuts 0, which spring tendsto force the fingers toward each other, as indicated in Fig. 4. Mountedupon the upper end of the shaft 1) is a crank a, which engages theflanged rim of a collar 'L, loosely mounted on the shaft g to one sideof the idler c. J ournaled in the adjacent side plate of the pendularyoke is a short vertical shaft m, upon the lower end of which is mounteda yoke Z, in the forward ends of which are slots k, which engage radialpins on the collar 1). On the upper end of the shaft on is an arm n,which is perforated at its forward end to permit a rod 0 to pass freelytherethrough. Said rod 0 is provided with a suitable collar or setnut 1)beyond the arm n and is connected at its opposite end to a crank r,fixed to the shaft 8. It will be seen that when the shaft 8 is rocked bythe hand-lever z and the connecting reach-rod mechanism to retract therod 0, the set-nut p will engage the arm a, thereby rocking shaft m andthe fork Z connected therewith, which in turn slides the collar tlongitudinally of the shaft 9 and forces crank a inward, thereby rockingshaft 1) and moving fingerf laterally. A stop g on the shaft 1) engagesa similar stop g on the shaft 12, so that as shaft 1) is rocked by itscrank a shaft 7) will also be rocked in the opposite direction by theengagement of stops g g, and finger f will also be moved laterally, andthe two fingers f f will be spread apart against the tension of spring mon the rod Z. If the hoist-block b be now lifted until the strap 71passes between the fingers f j and shaft 8 be rocked in the oppositedirection by means of the hand-lever z, the spring m will force thefingers f f toward each otheruntil said fingers slip under the strap 0;and clutch the hoist-block b to the ib.

It is to be noted that the pendular yokes 7L and v are pivoted to theshafts of idlers c and 6, respectively, so that each of said yokes willalways hang vertically in position to engage the correspondinghoist-blocks irrespective of the relation of the jib Cthat is to say,whether the said jib be raised or lowered.

In hoisting a load by one of the blocks it is frequently found that theother block will obstruct the load in its upward movement. Hence we havefound it desirable to secure the idle hoist-block to the jib so that itwill clear the load lifted by the other block. This is effected by meansof a hook q, pivoted to the jib, which is'adapted to engage an eye orloop 1/ on the hoist-block a, so that the latter will be held out of thepath of the load lifted by block I). Said hook is operated by areach-rod 1*, which is connected at its oppo site end to a hand-lever s,mounted at the foot of the jib adjacent to the hand-lever 2, so that assaid hand-lever s is moved backward the hook will lock the hoist-block bto the jib, and when said hand-lever is swung in the opposite directionsaid hook q will be released from engagement with the hoistblock a.

It is to be particularly noted that the entire control of each of thehoist-blocks is effected from the single cable w and the handlever 2 onthe jib, so that the respective hoist-blocks may be operated in allpositions of the jib. For example, when it is desired to use hoist blocka to lift a load the handlever 2 is pulled backward-that is, toward thefoot of the jib-thereby rocking shaft 8 to release the cable-brake w andcausing rod 0 to rock the shaft m, which, through the intermediatemechanism above described, spreads the fingers f f apart. Hoist-block bis then run up until strap t passes between the fingers f f, and uponthe operator moving hand-lever z to mid position the spring m forces thefingers f 7 under the strap 01, and thereby clutches said sheave b tothe I30 pendular yoke h, and therefore to the jib. The cable will nowrun over the sheave in hoist-block b as if the latter were a simpleidler, and the hoist-block a may be run up and down at will. In order toemploy hoistblock b in lifting, the hand-lever z is swung to its extremeforward position, thereby rocking the shaft 8, so that the eccentric uforces the brake to down upon the cable and clamps the same securely tothe idler (I, thereby anchoring the cable to the jib at said idler d.This may be accomplished, of course, irrespective of the position of thehoist-block a; but it is preferable in order to distribute the strain onthe cable to run said hoist-block a up until it engages the pendularyoke o.

What we claim as our invention is 1. In wrecking-cranes andlikeapparatus, the combination of two hoist-blocks supported from thejib, an intermediate idler-sheave, an operating-cable engaging thehoist-blocks and intermediate sheave, means for locking the cableagainst motion between the hoistblocks, and means for locking one ofsaid blocks to the jib,'whereby either of said blocks may be operated bythe same cable.

2. In wrecking-cranes and like apparatus, the combination of twohoist-blocks supported from the jib, an intermediate idler-sheave on thejib, an operating-cable anchored at one end to the jib and connected toa winding-drum at the other end, said cable engaging the hoist-blocksand the idler, a clamp I01 locking the cable to the idler, a clutch forlocking one of said blocks to the jib, and means for operating saidclamp and said clutch, whereby either of said blocks may be operated bythe same cable.

3. In wrecking-cranes and like apparatus, the combination oftwohoistblocks supported from the jib, an intermediate idler-sheave on thejib, an operating-cable anchored at one end to the jib and connected toa winding-drum at the other end, said cable engaging the hoist-blocksand the idler, a clamp for locking the cable to the idler, a clutch forlocking one of said blocks to the jib, a handlever, and reach-rodconnections from the hand-lever to the clamp and clutch, whereby eitherof said blocks may be operated by the same cable.

4:. In wrecking-cranes and like apparatus, the combination of twohoist-blocks supported from the jib, idler-sheaves on the jib adj acentto each of said blocks, an idler-sheave on the jib intermediate thefirst-mentioned idler-sheaves, an operating-cable anchored at one end tothe jib and engaging a windingdrum at the other end, a clamp on the jibfor locking the rope to the intermediate idlersheaves, a pendular clutchon the jib for locking one of the blocks to the jib, a handlever, andreach-rod connections from the hand-lever to the clamp and the clutch,whereby either of said blocks may be operated by the same cable.

' 5. In wrecking-cranes and like apparatus, the combination of twohoist-blocks, an operating-cable therefor, and means for holding theidle hoistblock clear of the load lifted by the other hoist-block.

6. In wrecking-cranes and like apparatus, the combination of twohoist-blocks, an operating-cable therefor, and a hook on the jib adaptedto engage the idle hoist-block and hold the same clear of the loadlifted by the other hoist-block.

7. In wrecking-cranes and like apparatus, the combination of twohoist-blocks, an operating-cable therefor, a hook on the jib adapted toengage the idle hoist-block and hold the same clear of the load liftedby the other hoist-block, and a hand-lever and reach-rod on the ib foroperating said hook.

In testimony whereof we afliX our signatures in presence of twowitnesses.

SAMUEL LIPPINCOTT GRISWOLD KNOX. WALTER FERRIS.

Witnesses:

HARRY B. HAYDEN, PAUL C. Bonn.

